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ABI-Encode Typed Parameters
x402
ABI-Encode Typed Parameters is a paid API for AI agents from twin.unykorn.org, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-01).
ABI-encodes a list of typed parameters into Ethereum ABI binary format
Price / call$0.002
Success—
StatusUnknown
How this service works
ABI-encode a list of typed parameters — Genesis402 / UnyKorn Operator Network
Output
Returns a JSON object with ok:true, the encoded ABI hex string, and a payment receipt including transaction hash, amount paid in USD, and a unique receipt ID. The ABI-encoded result can be used directly as calldata or as part of a larger transaction payload.
Example use cases
Build EVM contract calldata
“I need to ABI-encode the types ['address','uint256','bool'] with values ['0xDeAdBeEf000000000000000000000000DeAdBeEf', 500, true] so I can assemble a raw transaction to send to a smart contract.”
Encode tuple for multicall
“Can you ABI-encode a tuple? The types are ['tuple(address,uint256)'] and the value is [['0x1234567890abcdef1234567890abcdef12345678', 42]] — I'm building a multicall payload.”
Verify encoding matches on-chain expectation
“ABI-encode types ['bytes32','uint8'] with values ['0xdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef', 7] so I can check the output matches what my Solidity unit test expects.”
Technical details
Endpoint
POSThttps://twin.unykorn.org/abi-encode?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs to ABI-encode Ethereum parameters without a local Web3 library (ethers.js, viem, web3.py) available, or when running in a sandboxed environment that can't execute arbitrary code. Ideal for agents constructing raw contract calldata, multicall payloads, or verifying encoding outputs in a blockchain workflow. It costs $0.002 USDC per call via x402, so prefer a local library when one is available at no cost.
Side effects
- Mismatched types and values arrays length — returns error indicating count mismatch
- Invalid Solidity type strings (e.g. 'uint' without bit size) — returns type parsing error
- Values that don't conform to declared types (e.g. string where uint256 expected) — returns encoding error
- Payment failure or insufficient USDC balance — returns 402 Payment Required
- Malformed JSON request body — returns 400 Bad Request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| params | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"type": "abi-encode",
"receipt": {
"tx_hash": "0x<64hex>",
"amount_usd": 0.002,
"receipt_id": "g402-<16hex>"
},
"generated_at": "<iso8601>"
}
}Tags
x402
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